Dtc C15A2/62 Actuator Malfunction
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)
CHECK HARNESS AND CONNECTOR (STEERING CONTROL ECU - STEERING ACTUATOR)
CHECK STEERING ACTUATOR
CHECK DTC
DTC C15A2/62 Actuator Malfunction
DTC C15A6/62 Actuator Malfunction
DESCRIPTION
The steering control ECU drives the actuator based on steering angle sensor signals and vehicle speed signals.
If the steering control ECU detects excessive current flowing into the steering actuator, or an internal malfunction, it will turn on the master warning light, store DTC C15A2/62, and stop VGRS operation.
If the steering control ECU detects a malfunction in the motor drive circuit, it will turn the master warning light on, store DTC C15A6/62, and stop VGRS operation.
| DTC Code | DTC Detection Condition | Trouble Area |
| C15A2/62 |
The VGRS system detects a malfunction in the motor drive circuit. |
Harness or connector
Power source circuit
Steering actuator
Steering control ECU
|
| C15A6/62 |
The actual motor current value greatly differs from the estimated value. |
Power source circuit
Harness or connector
Steering actuator
Steering control ECU
|
WIRING DIAGRAM
INSPECTION PROCEDURE
- Only the actuator only can be checked in this procedure. If it is normal, the steering control ECU is faulty.
| 1.CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) |
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Condition | Specified Condition |
| E77-7 (PGND) - Body ground | Always | Below 1 Ω |
| E78-8 (PGD2) - Body ground |
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
| Tester Connection | Condition | Specified Condition |
| E77-8 (PIG) - Body ground | Always | 11 to 14 V |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| 2.CHECK HARNESS AND CONNECTOR (STEERING CONTROL ECU - STEERING ACTUATOR) |
Disconnect the E78 steering control ECU connector.
Disconnect the E80 steering actuator connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Condition | Specified Condition |
| E78-1 (BMV) - E78-2 (BMU) | Always | 10 kΩ or higher |
| E78-1 (BMV) - E78-3 (BMW) |
| E78-2 (BMU) - E78-3 (BMW) |
| E78-1 (BMV) - E80-5 (BMV+) | Always | Below 1 Ω |
| E78-2 (BMU) - E80-4 (BMU+) |
| E78-3 (BMW) - E80-13 (BMW+) |
| E78-1 (BMV) - Body ground | Always | 10 kΩ or higher |
| E78-2 (BMU) - Body ground |
| E78-3 (BMW) - Body ground |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| 3.CHECK STEERING ACTUATOR |
Disconnect the E78 steering control ECU connector.
Measure the resistance according to the value(s) in the table below.
- The resistance must be measured with the steering actuator connector connected.
- Standard Resistance:
| Tester Connection | Condition | Specified Condition |
| E78-1 (BMV) - E78-2 (BMU) | Always | Below 1 Ω |
| E78-1 (BMV) - E78-3 (BMW) |
| E78-2 (BMU) - E78-3 (BMW) |
| E78-1 (BMV) - Body ground | Always | 10 kΩ or higher |
| E78-2 (BMU) - Body ground |
| E78-3 (BMW) - Body ground |
| | REPLACE STEERING ACTUATOR ASSEMBLY ()
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|
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Check for DTCs ().
Result| Result | Proceed to |
| C15A1/61 is output | A |
| C15A1/61 is not output (for LHD) | B |
| C15A1/61 is not output (for RHD) | C |
| | REPLACE STEERING CONTROL ECU ()
|
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| | REPLACE STEERING CONTROL ECU ()
|
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| A | |
| |
| REPLACE STEERING ACTUATOR ASSEMBLY ()
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